I appreciate your interest in collaborating. To address your collaboration inquiries, please send an email at firstname.lastname@example.org with the subject line "collaboration." In the body of your letter, write a summary of why you need me to collaborate or join your team.
However, if you would like to discuss how I can help and work together with your team, I would be glad to accept your instant message or call via Whatsapp +63 999 835 5013 or Skype pa-ul2011.
I look forward to doing business with you.